Marine diesel engine

A diesel engine and engine technology, which is applied in the directions of engine components, combustion engines, machines/engines, etc., can solve the problems of large and complicated piping structure, complicated opening and closing control of switching valves, etc., and achieve the effect of simple structure

CN111108272AActive Publication Date: 2020-05-05JAPAN ENGINE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-05-05

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Abstract

A marine diesel engine according to an embodiment of the present invention is provided with: an engine body which burns fuel to generate the propulsion force of a ship; a first supercharger and a second supercharger which use exhaust gas from the engine body to rotate compressors; a circulation pipe for circulating combustion gas from the compressor of the first super charger to the compressor ofthe second super charger; and an auxiliary blower. The first super charger suctions the combustion gas from the outside and compresses the combustion gas. The second super charger further compresses the combustion gas compressed by the first supercharger and transfers the combustion gas to the engine body. The auxiliary blower is provided to the circulation pipe and assists the supply of the combustion gas to the engine body.
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Description

technical field

[0001] The present invention relates to a marine diesel engine mounted on a ship. Background technique

[0002] Conventionally, in the field of ships, marine diesel engines employing a plurality of turbochargers such as two-stage superchargers have been known as means for improving the output and fuel efficiency of the engine main body. For example, Patent Document 1 discloses a diesel engine of a two-stage supercharging method. In this diesel engine, a high-pressure stage and a low-pressure Each supercharger of the stage includes a supercharger (turbocharger) configured to be able to rotate a turbine together with a compressor by utilizing the pressure of exhaust gas discharged from the engine body. In these superchargers, each turbine is connected in series to the engine main body via exhaust gas discharge piping. Each of the compressors is connected in series to the engine main body via a combustion gas delivery pipe. In addition, in the diesel engine d...

Examples

Embodiment Construction

[0019] Hereinafter, preferred embodiments of the marine diesel engine of the present invention will be described with reference to the drawings. In addition, this invention is not limited based on this embodiment. In addition, the drawings are schematic, and it should be noted that the dimensional relationship of each element, the ratio of each element, and the like may differ from actual ones. Between the drawings, there may be cases where parts with different dimensional relationships and ratios are included. In addition, in each drawing, the same code|symbol is attached|subjected to the part of the same structure.

[0020] (Structure of Marine Diesel Engine)

[0021] Hereinafter, first, the schematic structure of the engine main body of the marine diesel engine according to the embodiment of the present invention will be described, and then the overall structure of the marine diesel engine will be described.

[0022] figure 1 It is a schematic diagram showing an engine ...